Adjustable burner

ABSTRACT

A burner unit is provided with a housing in which a plurality of nozzles are removably coupled to a fuel supply. The burner nozzles are mounted in the housing for axial and rotatable movement.

United States Patent 1191 Pared es et'al.

1111 3, 22,110 a 1451 July 2, 1974 [5 ADJUSTABLE BURNER [75] Inventors: Candelario Paredes, Dallas, Tex.;

Norman K. Trozzi, West Caldwell, NJ.

[73] Assignee: ForneyEngineering Company,

' Carrollton, Tex.

[22 Filed: Feb. 22, 1973 21 Appl.No.:334,782

[52] US. Cl 431/174, 431/175, 431/186, 431/189, 239/580 [51] Int. Cl. F23c 5/00 [58] Field of Search 43l/175, 174, 178, 179, 431/186, 189, 283; 239/588 [56] References Cited UNITED STATES PATENTS 657,579

9/1900 White 431/174 2,196,282 4/1940 Voorheis 431/174 2,480,459 8/1949 Fletcher 431/174 3,115,851 12/1963 Ceely 431/174 FOREIGN PATENTS OR APPLICATIONS 518,516 2/1940 Great Britain 431/186 Primary Examiner-Carroll B. Dority, Jr. Attorney, Agent, or Firm- Marvin A. Naigur; John E. Wilson; John P. De Luca [57] ABSTRACT A burner 'unit is provided with a housing in which a plurality of nozzles are removably coupled to a fuel supply. The burner nozzles are mounted in the housing for axial and rotatable movement.

1 Claim, 4 1)rawing Figures Flanegin 431/186 1 ADJUSTABLE BURNER BACKGROUND OF THE INVENTION DESCRIPTION OF THE PREFERRED I EMBODIMENT With reference to FIG. 1, there is shown a burner as- In the operation of large vapor generators, it has be- 5 sembly generally designated by the reference numeral come necessary to employ a burner system having a plurality of nozzles that are capable of being easily adjusted. The fixed type of multi-nozzle gas burners which heretofore have been used do not provide for adjustment of the nozzle, either axially of rotatably with respect to the nozzle axes. This necessitates difficult modifications to the burners in orderto adjust the nozzle to avoid excess vibration and flame instability in the burner assembly. ln the use of prior burner assemblies, ithas often been necessary to use cutting torches to free the burners for adjustment and'then reweld the,

burner nozzles in order to alleviate the vibration problem. The burner assembly of the present invention is capable of being adjusted either axially or rotatably or both axially and rotatably, such that the burner nozzles can be positioned in the most optimum location for reducing vibration and achieving flame stability. Also, it

is highlydesirable to be able to reposition the burner" nozzle in a series of different positions until the most optimum location is found, as opposedto the fixed system of prior burner units which required difficult cutting and rewelding operations.

SUMMARY OF THE INVENTION In accordance with an illustrative embodiment demonstrating features and advantages of the present invention, there is provided a burner assembly capable of being connected to a fuel supply including a housing for mounting cylindrical burner nozzles. A plurality of cylindrical burner nozzles are movably mounted in the housing. Coupling means capable of being disconplaced in flow communication with the interior of furnace chamber, generally designated 32. f

The burner assembly 10 comprises an'outer housing generally designated 34 which is'mounted in the windbox 12. The housing 34is definedlby a burner barrel 36, a rear end plate 38,'and a front barrel opening 40. A cylindrical wall 42 is secured on the rear end plate v 38 for mounting a circular outer plate 44 to define a nected are .in flow communication between the fuel u supply and the nozzles. Adjustment means for movably mounting the burner nozzles are in the housing to axially move and rotate the burner nozzles after the coupling means have been disconnected. Thus, the burner nozzles can be moved into an optimum position to reduce vibration of the burner nozzles in the housing.

I I BRIEF DESCRIPTION OF THE DRAWINGS The above brief description, as well as further objects,'features, and advantages of the present invention will be more fully appreciated by reference to the following detailed description of a presently preferred but nonetheless illustrative embodiment in accordance with the present invention, when taken in connection with the accompanying drawings wherein:

FIG. 1 is a front elevational view of a burner assembly with portions being broken away and sectioned to bettershow the adjustment means of the present invenpurge and seal air manifold 46. I

An air register 50 is mounted in the windbox 12 by means of an air register assembly .52 secured to front wall 16 and an air register back plate 54 which is fixed to burner barrel 36.

A central oil gun mounting tube 56 in the form of a cylindrically shaped tube ismounted on the end plate 38 in a fixed position and extends through the housing 34 for mounting an oil gun in the mounting tube 56..As best shown in FIG. 4, theoil gun mounting tube 56' is provided with a removably secured cover plate 58.

A plurality of gas guns 60 in the form of cylindrically shaped nozzle. tubes are installed in a plurality of gas gun mounting tubes 62 which are mounted on end plate 38 and are positioned to surround the oil gun mounting tube 56. Each gas gun 60 is defined by a cylindrical wall 64 formed with a rearward opening 66 and a forward exhaust opening 68, with the exhaust opening 68 having aslante'd configuration. It shouldbe noted that the gas gun 60 and the oilgun, which can be positioned in mounting tube 56, can work independently of each other depending on v the mode'of operation required and the only additional equipment required is an ignition means which is well known in the art and hasnot been shown in the drawings for the sake of simplicity.

As best shown in FIG. 3, the gas gun mounting tubes 56. Threelegs are provided for mounting the outer v collar 72 to the inner collar 74. A plurality of guide tube ferrules 76 having a generally cylindrical configuration are welded along the outer periphery of outer collar 72 and the twolowermost guide tube ferrules 76 are mounted on a support stand 78 which serves as a mounting for support spider 70. The rear end plate 38 and outer plate 44 are formed with through openings 80 for receiving oil gun mounting tube 56 and through openings 82 for receiving gas gun mounting tubes 62. Each of the gas gun mounting tubes 62is comprised of a front tube 83 that is welded to a rear tube 84 which is received in through opening 82. The gas gun mounting tube 62 is welded to the purge and seal air mainfolcl and gas supply manifold 86. As shown in FIG. 4, the gas supply manifold 86 is connected to a fuel inlet 89. The hose connections 88 are formed in the shape of a gastightcylinder 90 of a suitable length and fabricated from a flexible material having a wire mesh, stainless steel, outer covering which is secured to a rear tube connection 92. As best shown in FIG. 4, the hose connections 88 are connected to gas supply manifold 86 by means of end sleeves 94 that are welded to manifold 86. The rear tube connections 92 are formed with shoulders 96 for receiving a union coupler 98 having internal threads 100 for threadably engaging external threads 102 formed on end sleeve 94. The end of flexible hose connection 88 opposite to the rear tube connection 92 is fixed to a front end sleeve 104 which in turn is welded to the end of the cylindrical wall 64 of gas gun 60.

Turning to FIG. 4, adjustment means generally designated 106 areprovided for axially moving and rotating the burner gas guns 60. The adjustment means 106 comprise two internally threaded holes 108 formed on rear tube 84 engaging a plurality of externally threaded set screws 110.

The degree of rotation and axial movement of gas guns 60 can be observed by a fixed post indicator 112 which is welded to rear tube 84 and a movable post indicator 114 which is welded to gas gun 60. Thus, the distance between the post indicators 112 and 114 readily shows the axial position of gas guns 60 in the gas gun mounting tube 62. Also, the rotatable alignment of the indicators 112 and 114 shows the degree of rotation of gas gun 60 in mounting tube 62.

As best shown in FIG. 4, the rear tube 84 is formed with a counterbored recess 116 for receiving a packing gland 118 and a cylindrical insert 120 integrally formed with a radial shoulder gasket 122. The shoulder gasket 122 is formed with through openings 124 for freely passing through threaded studs 126 which are secured to the outer periphery of rear'tube 84 by the weld 128. The shoulder gaskets 120 are maintained in position by threadably engaging bolts 130 with the studs 126 to securely maintain the packing gland 118 in the counterbored recess 116. The shoulder gaskets 120, threaded studs 126 and bolts 130 also serve as a means of sealing the oil gun mounting tube 56.

In order to change the axial position of the gas guns 60, it is merely necessary to loosen the set screw and move the gas gun 60 in the guide tube ferrule 76. In this manner, due to the flexibility of the hose connection 88, it is possible to-axially move the gas gun 60 the required distance and then tighten the set screws 110. The rotatable position of the gas guns 60 is changed by loosening the set screws 110 in the same manner as for changing the axial position, and then the union coupler 98 is disengaged such that the hose connection 88 can be moved to the broken line position shown in FIG. 1. In this manner, the gas gun 60 is free to rotate in guide tube ferrule 76 in order to obtain an optimum position, and the set screws 110 are tightened until secure contact is made with the gas gun 60. Once the gas gun 60 has been placed in a fixed position, the union coupler 98 is engaged with the threaded end of end sleeve 94. i

A latitude of modification, change and substitution is intended in the foregoing disclosure and in some instances some features of the invention will be employed without a corresponding use of other features. Accordingly, it is appropriate that the appended claims be construed broadly and in a manner consistent with the spirit and scope of the invention herein.

What is claimed is: i

l. A burner assembly capable of beingconnected to a fuel supply comprising: a cylindrical housing for mounting burner nozzles; a plurality of cylindrical burner nozzles axially and rotatably movably mounted in said housing; ferrule tubes having a cylindrical configuration similar to said burner nozzles and sized to receive same, and means mounting said tubes about a central axis in said housing; coupling means including cylindrically shaped flexible hoses fabricated of a flexible material in flow communication between an annular fuel supply manifold and said nozzles and threaded connections comprising a union mounted on an end of said hoses and said fuel supply manifold such that the hoses can be disengaged from the fuel supply manifold for adjustment of the burner nozzles; adjustment means including set screws threaded in openings in said ferrule tubes engaging with the nozzles for securing same in place when tightened and permitting the rotatable and axial adjustment of the nozzles when loosened, and first and second indicator posts respectively mounted on each of said ferrule tubes and nozzle tubes for providing relative indication of radial an axial position of the nozzles in the ferrule tubes. 

1. A burner assembly capable of being connected to a fuel supply comprising: a cylindrical housing for mounting burner nozzles; a plurality of cylindrical burner nozzles axially and rotatably movably mounted in said housing; ferrule tubes having a cylindrical configuration similar to said burner nozzles and sized to receive same, and means mounting said tubes about a central axis in said housing; coupling means including cylindrically shaped flexible hoses fabricated of a flexible material in flow communication between an annular fuel supply manifold and said nozzles and threaded connections comprising a union mounted on an end of said hoses and said fuel supply manifold such that the hoses can be disengaged from the fuel supply manifold for adjustment of the burner nozzles; adjustment means including set screws threaDed in openings in said ferrule tubes engaging with the nozzles for securing same in place when tightened and permitting the rotatable and axial adjustment of the nozzles when loosened, and first and second indicator posts respectively mounted on each of said ferrule tubes and nozzle tubes for providing relative indication of radial an axial position of the nozzles in the ferrule tubes. 